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/* SPDX-License-Identifier: GPL-2.0+ */ /* * Copyright (c) 2017 Google, Inc * Written by Simon Glass <sjg@chromium.org> * * Support for a 'live' (as opposed to flat) device tree */ #ifndef _OF_LIVE_H #define _OF_LIVE_H struct abuf; struct device_node; /** * of_live_build() - build a live (hierarchical) tree from a flat DT * * @fdt_blob: Input tree to convert * @rootp: Returns live tree that was created * Return: 0 if OK, -ve on error */ int of_live_build(const void *fdt_blob, struct device_node **rootp); /** * unflatten_device_tree() - create tree of device_nodes from flat blob * * Note that this allocates a single block of memory, pointed to by *mynodes. * To free the tree, use free(*mynodes) * * unflattens a device-tree, creating the * tree of struct device_node. It also fills the "name" and "type" * pointers of the nodes so the normal device-tree walking functions * can be used. * @blob: The blob to expand * @mynodes: The device_node tree created by the call * Return: 0 if OK, -ve on error */ int unflatten_device_tree(const void *blob, struct device_node **mynodes); /** * of_live_free() - Dispose of a livetree * * This frees memory used by the tree, after which @root becomes invalid and * cannot be used * * @root: Tree to dispose */ void of_live_free(struct device_node *root); /** * of_live_create_empty() - Create a new, empty tree * * @rootp: Returns the root node of the created tree * Return: 0 if OK, -ENOMEM if out of memory */ int of_live_create_empty(struct device_node **rootp); /** * of_live_flatten() - Create an FDT from a hierarchical tree * * @root: Root node of tree to convert * @buf: Buffer to return the tree (inited by this function) * Return: 0 if OK, -ENOMEM if out of memory */ int of_live_flatten(const struct device_node *root, struct abuf *buf); #endif |